Music-chart



C. S. MASON.

MUSIC GHART.

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(No Model.)

WITNESSES MJ; l

f 7 UNITED STATES PATENT OFFICE.

CHARLES S. MASON, OF ORANGE, CALIFORNIA.

A' MUSIC- CHART.

\ SPECIFICATION forming part of Letters Patent No. 375,495I dated December 27, 1887.

Application filed April 1G, 1887.

To aZZw/"Lom t may concern:

Be it known that I, CrrARLEs S. MAsoN, of Orange, in the county ofLos Angeles and State of California, have invented a new and lmproved Music-Chart, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in Which- Figure 1 is a front elevation of my improved music-chart, and Fig. 2 is a front elevation of the rear portion of the chart. v

- Similar letters of reference indicate correspending parts in both-views.

The object of my invention is to provide a simple and efficient device for use in connection with pianos and organs for transposing music from one key to another.

My invention consists in a card provided with projections upon one edge adapted to tit into the wider spaces between the black keys of the key-board to locate rthe chart with reference to the scale of the instrument in connection with which it is used, and carrying the letters in the scale, with appropriate indices and the numerals representing the signatures; also, in connection with the card, of

' an apertured card provided with stripes of different colors representing the different chords, aperturesv being made in the said stripes in the order required for showing the letters of the different chords of the various keys, also,

4 an aperture for exposing to view the gures on the rear card representing the signatures.

The card A, forming the body of the chart, is provided with three rows of letters, representing in three series theuotes of the scale. In practice I make the letters on the card A, representing the notes of the natural scale and sharps, larger than the letters representing flats, and to render the distinction still more complete I make the letters representing flats in red, so that when they are superposed upon black they may be readily distinguished. This occurs where one note sharped and a note above itiiatted are made to occupy the same position on the scale. For example, A-sh'arp (printed in black) will occupy 'the same space with B-at printed in red.

The card B, which is arranged to slide over Serial No. 235,106. (No model.)

the card A, is provided withv three stripes, a b c, of different colors, the top line, a, representing the tonie or first chord, the second line, b, representing the subdominant chord, the line c representing the dominant chord. rlhe stripes a b c correspond in position with the rows of letters upon the card A, and in the several stripes are rectangular apertures d,

through which the letters upon the card A are displayed.

Near the upper edge of the card B,Vuear one end, is formed an aperture, c, `through which the two rows of iiguresf g on the card A may be displayed. Opposite the upper row of figures, and upon the face of the card B, is marked the word Flats, and opposite the lower row of figures upon the froutof the card B is marked the wor( Sharps.7 These igures represent the signatures, and by sliding the card B over the card A until the iigure representing the required signature appears in the aperture c the letters representing the notes for the tonic, subdominant, and dominant chords will appear through the apertures d of the card B.

The chart is to be placed upon the key-board of au organ or piano with the extensions on the lower edge of the card A tting into the spaces between the black keys. Then move the card B until the eut-out space just to the right of the words key of77 is directly over the key giving the pitch desired as the tonic of the scale. The above-mentioned space and those to the right on the same line form the tonic chord, the subdominaut and the dominant being on the lines below. To play, the first two left-hand letters of a chord are struck with the left hand and the remaining three letters with the right hand, alternately-z'. e., striking the accented beats of music with the left hand and the unaccented with the right hand. The three partsthe tonic, subdominant, and dominant-are played in the same manner. When you have the music, note the signature of the piece, and then move the card B until` the-same signature appears in the cutout space to the right of the signature is,77 and proceed as aforementioned.

My improved chart is lrapid and positive in IOO which the vchart is applied, and the card B, provided with stripes a b c and apertures d e, ro substantially as described.

CHARLES S. MASON.

Having thus described lnyinvcntion, I claim as new and desire to secure by Letters Patent- In :L music-chart, the combination of the card A, bearing series of letters representing 5 the notes ofthe scale, and series of gures representing the signatures and provided with Witnesses: projections upon one edge adapted to fit be- ABEL FRAZIER, tween the black keys of the instrument to C. E. AILES. 

